checking files using c#

Question

plz any one help i need code in c# for checking afile is exisisting if it exists display that file if does not exists create a file in any folder using c# its very urgent if any ine have htis in vb.net also u can give me thanks

Alan · Answer

You can use the System.IO.File.Exists() method to determine whether a file exists or not. See this link for examples of usage in both C# and VB.Net: http://msdn2.microsoft.com/en-us/library/system.io.file.exists.aspx Here's a console app in C# which does what you've specifically asked for: // requires .NET 2.0 or later using System; using System.IO; class Test { static void Main() { string filePath = @c:\myfiles\somefile.txt; // say string[] lines; if (File.Exists(filePath)) { lines = File.ReadAllLines(filePath); foreach(string line in lines) Console.WriteLine(line); } else { lines = new string[2]; lines[0] = Hello; lines[1] = From C# Corner; File.WriteAllLines(filePath lines); } } } In VB.Net this would be: ' requires .NET 2.0 or later Imports System Imports System.IO Class Test Shared Sub Main() Dim filePath As String = c:\myfiles\somefile.txt ' say Dim lines As String() If File.Exists(filePath) lines = File.ReadAllLines(filePath) For Each line As String In lines Console.WriteLine(line) Next Else lines = New String(2){} lines(0) = Hello lines(1) = From C# Corner File.WriteAllLines(filePath lines) End If End Sub End Class